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United States Patent | 5,674,043 |
Dorn | October 7, 1997 |
A wheel chair lift mechanism which can be installed in a storage compartment of a commercial vehicle to assist mobility-impaired persons in their ingress and egress to and from such vehicles is made up of a retractable control mechanism between fixed and movable frames within the storage compartment for selectively advancing a platform assembly between a retracted position within the storage compartment and an extended position outside of the compartment, and a lift mechanism for lifting and lowering the platform assembly between a ground level position, raised position aligned with the doorway and a stowed position aligned with the storage compartment.
Inventors: | Dorn; Russell J. (Aurora, CO) |
Assignee: | Stewart & Stevenson Power, Inc. (Commerce City, CO) |
Appl. No.: | 560293 |
Filed: | November 17, 1995 |
Current U.S. Class: | 414/541; 187/222; 254/122; 414/542; 414/631; 414/663; 414/921 |
Intern'l Class: | B60P 001/44 |
Field of Search: | 414/633,541,921,543,917,542,539,462,540,544,630,549,628,629,631,662,663 187/222,226 254/122,4 R,4 C |
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4022337 | May., 1977 | Eichenhofer et al. | |
4081091 | Mar., 1978 | Thorley. | |
4083429 | Apr., 1978 | Abott | 414/541. |
4164292 | Aug., 1979 | Karkaw | 414/545. |
4180366 | Dec., 1979 | Roth et al. | 414/540. |
4556128 | Dec., 1985 | Thorley et al. | |
4685858 | Aug., 1987 | Manning et al. | 414/537. |
4958979 | Sep., 1990 | Svensson | 414/549. |
5149246 | Sep., 1992 | Dorn | 414/541. |
5158419 | Oct., 1992 | Kempf et al. | 414/921. |
5224723 | Jul., 1993 | Hatas | 414/541. |
5316432 | May., 1994 | Smalley et al. | 414/540. |
5375962 | Dec., 1994 | Kempf | 414/541. |
Foreign Patent Documents | |||
444386 | Sep., 1991 | EP | 414/541. |
2516460 | May., 1983 | FR | 414/921. |
2617754 | Apr., 1976 | DE | 414/542. |